In this paper, a magnetic-force based thickness measurement model was established based on the physical properties of radar absorbing coatings that are easy to be magnetized and the experimental data obtained from the standard samples with titanium alloy substrate coatings. The experimental data obtained from the thickness measurement experiment of the standard samples with titanium alloy substrate coatings were fitted by using least squares method. A thickness measurement sensor was developed based on the STM32 microcontroller, which solved the problem that the traditional wireless design was unable to balance transmission distance, anti-interference, and power consumption. On this basis, thickness measurement software was developed based on WinCE 6.0 and measurement experiments were done. The experimental results showed that this magnetic-force based thick measurement system had the advantages of simple structure and high software reliability.
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